CN103127965B - Control system of pollution-free biosafety cabinet - Google Patents
Control system of pollution-free biosafety cabinet Download PDFInfo
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- CN103127965B CN103127965B CN201310086479.0A CN201310086479A CN103127965B CN 103127965 B CN103127965 B CN 103127965B CN 201310086479 A CN201310086479 A CN 201310086479A CN 103127965 B CN103127965 B CN 103127965B
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- 230000006378 damage Effects 0.000 abstract description 2
- 238000005202 decontamination Methods 0.000 abstract 1
- 230000003588 decontaminative effect Effects 0.000 abstract 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 9
- 230000001954 sterilising effect Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000001413 cellular effect Effects 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000004659 sterilization and disinfection Methods 0.000 description 4
- 150000002894 organic compounds Chemical class 0.000 description 3
- GVJHHUAWPYXKBD-UHFFFAOYSA-N (±)-α-Tocopherol Chemical compound OC1=C(C)C(C)=C2OC(CCCC(C)CCCC(C)CCCC(C)C)(C)CCC2=C1C GVJHHUAWPYXKBD-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
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- 229910021529 ammonia Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 206010006451 bronchitis Diseases 0.000 description 1
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- WIGCFUFOHFEKBI-UHFFFAOYSA-N gamma-tocopherol Natural products CC(C)CCCC(C)CCCC(C)CCCC1CCC2C(C)C(O)C(C)C(C)C2O1 WIGCFUFOHFEKBI-UHFFFAOYSA-N 0.000 description 1
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- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
Abstract
The invention relates to a control system of a pollution-free biosafety cabinet, and belongs to the technical field of experimental equipment. The biosafety cabinet is sequentially provided with a primary filter, a fan, a first ultraviolet lamp, a first photocatalyst layer, a second ultraviolet lamp, a second photocatalyst layer and a main filter at an air inlet of a decontamination chamber, and the control system comprises a first threshold comparator, a second threshold comparator, a processor, a warner and a display; the first threshold comparator is used for comparing a signal output by a first differential pressure sensor and a first threshold, when the output signal is greater than the first threshold, the warner alarms, and the display shows letters indicating invalidation of the filter; and the second threshold comparator is used for comparing the signal output by the first differential pressure switch with a second threshold, when the output signal is less than the second threshold, the warner alarms, and the display shows letters indicating damage of the filter. The control system provided by the invention is capable of conveniently judging the condition of the filter.
Description
Technical field
The present invention relates to a kind of Control system of pollution-free biosafety cabinet, belong to technical field of experiment equipment.
Background technology
Fig. 1 is the side schematic view of Biohazard Safety Equipment of the prior art.As shown in Figure 1, shown in 1, described Biohazard Safety Equipment comprises the housing 1 be arranged on support 30, and the lower end of four legs of support 30 is provided with castor 31.Housing 1 comprises front shrouding 25, front shroud 26, Zuo Bi, You Bi, roof and diapire, portion is provided with an air dispersion plate 27 within the case 1, the first half of front shroud 26, left wall, the upper part of right wall, roof and air dispersion plate form a upper space, the latter half of front shrouding 25, left wall, the latter half of right wall and diapire form a lower space, clean room 2 is provided with in upper space, operating room 3 is provided with in lower space, front shrouding 25 can movablely also can be contracted in upper space, and the base plate 29 of the lower end in operating room is provided with pore.Clean room and operating room are connected after the structure that formed, the left side and form negative pressure channel between the right side and housing, and blower fan 4 laid by the platform of clean room's air inlet.The top of clean room is provided with exhaust outlet, is arranged with exhaust-air filter 10 at exhaust outlet.Between clean room 2 and operating room 3 establish, main filter 11 is set.In upper space, be provided with the motor 24 of shrouding 25 before driving, be arranged with illuminating lamp 28 at front shroud 26.In order to sterilization, at indoor location UV (ultraviolet) lamp 32 that works, namely UV (ultraviolet) lamp is utilized to carry out irradiating to kill the organic compound in air or mushroom, but sterilization is not thorough, and meanwhile, Ultraviolet radiation also makes the oxygen in air become ozone, when the concentration over-standard of the ozone in air, ozone is then an invisible killer, and the respiratory tract of its intense stimulus people, causes abscess of throat, cough uncomfortable in chest, causes bronchitis and pulmonary emphysema; Cause the neurotoxic of people, dizziness headache, visual impairment, to be losing one's memory; Destruction is played to the vitamin E in human body skin, cause the skin of people wrinkling, there is blackspot; Also can destroy the immunity function of human body, bring out lymphocyte chromosome pathology, accelerate old and feeble, cause pregnant woman to have a deformed child, the ozone that therefore Biohazard Safety Equipment is discharged can cause the secondary pollution to air.
Summary of the invention
For overcoming shortcoming existing in prior art, goal of the invention of the present invention is to provide a kind of Control system of pollution-free biosafety cabinet, described Biohazard Safety Equipment can sterilizing, sterilization, and can not cause secondary pollution to air, described control system can judge the situation of filter easily.
For realizing described goal of the invention, the invention provides a kind of Control system of pollution-free biosafety cabinet, described safety cabinet comprises housing, operating room is provided with in housing, clean room and air circulation system, wherein clean room is arranged on operating room, air circulation system is used for circulating air between operating room and clean room, air circulation system comprises the blower fan being arranged on clean room's air inlet, it is characterized in that, described safety cabinet is disposed with primary filter between operating room and clean room, blower fan, first ultraviolet lamp, first photocatalyst layer, second ultraviolet lamp, second photocatalyst layer and main filter, described control system also comprises the first differential pressure pickup, first threshold values comparator and the second threshold values comparator, two detecting heads of this first differential pressure pickup are separately positioned on the two ends of primary filter, wherein, first threshold values comparator is used for the signal that exported by the first differential pressure pickup and the first threshold values compares, when inputted signal is greater than the first threshold values, processor sends signal to alarm and display, make alarm equipment alarm, display is made to show the printed words of primary filter inefficacy, second threshold values comparator is used for the signal that exported by the first differential pressure pickup and the second threshold values compares, when exported signal is less than the second threshold values, processor sends signal to alarm and display, makes alarm equipment alarm, makes display show the printed words of primary filter breakage.
Preferably, described control system also comprises the second differential pressure pickup, the 3rd threshold values comparator and the 4th threshold values comparator, two detecting heads of the 3rd differential pressure pickup are separately positioned on the two ends of main filter, wherein, 3rd threshold values comparator is used for the signal that exported by the 3rd differential pressure pickup and the 3rd threshold values compares, when inputted signal is greater than the 3rd threshold values, processor sends signal to alarm and display, make alarm equipment alarm, make display show the printed words of main filter failure; 4th threshold values comparator is used for the signal that inputted by the second differential pressure pickup and the 4th threshold values compares, when inputted signal is less than the 4th threshold values, processor sends signal to alarm and display, makes alarm equipment alarm, makes display show the printed words of main filter breakage.
Compared with prior art, described Biohazard Safety Equipment can sterilizing, sterilization, and can not cause secondary pollution to air, described control system can judge the situation of filter easily.
Figure of description
Fig. 1 is the side schematic view of Biohazard Safety Equipment of the prior art;
Fig. 2 is the front schematic view of Biohazard Safety Equipment provided by the invention;
Fig. 3 is the side schematic view of Biohazard Safety Equipment provided by the invention;
Fig. 4 is the control system circuit diagram of Biohazard Safety Equipment provided by the invention.
Detailed description of the invention
Describe the present invention in detail below in conjunction with accompanying drawing, identical Reference numeral represents identical or similar parts.
Fig. 2 is the front schematic view of Biohazard Safety Equipment provided by the invention.Fig. 3 is the side schematic view of Biohazard Safety Equipment provided by the invention.As shown in Figures 2 and 3, described Biohazard Safety Equipment comprises the housing 1 be arranged on support 30, housing comprises front shrouding 26, front shroud 25, Zuo Bi, right wall, roof and diapire, portion is provided with an air dispersion plate 27 within the case 1, front shroud 26, the first half of left wall, the upper part of right wall, roof and air dispersion plate form a upper space, front shrouding 25, the latter half of left wall, the latter half of right wall and diapire form a lower space, clean room 2 is provided with in upper space, operating room 3 is provided with in lower space, front shrouding 25 can movablely also can be contracted in upper space, lower end in operating room is provided with pore.Clean room is connected after the structure that formed with operating room, the left side and the right side form negative pressure channel, the right side of clean room 4 is provided with air inlet, is disposed with primary filter 10, blower fan 4, first ultraviolet lamp 6, first photocatalyst layer 8, second ultraviolet lamp 7, second photocatalyst layer 9 and main filter 11 in air inlet.The contaminated air carrying the pollutants such as organic compounds, ammonia, sulphur dioxide flowed into from negative pressure air channel first filters through primary filter 10, and after the UV-irradiation that sends through ultraviolet lamp 6, organic compound forms contaminant particle material, then again through having the first photocatalyst layer of multiple cellular through hole, the second ultraviolet lamp 7, first photocatalyst layer with multiple cellular through hole and main filter, the surface of the cellular through hole of photocatalyst layer is coated with titanium dioxide granule.Be provided with distinguished and admirable guide plate 14 at the air outlet place of main filter, the place of the left wall of clean room touching the air outlet of reactor 9 corresponding with light is provided with distinguished and admirable guide way 15.The top of clean room is provided with exhaust outlet, under exhaust outlet, is disposed with the first ozone decomposed layer 12.Between clean room 2 and operating room 3, be disposed with the second ozone decomposed layer 13, described ozone decomposed layer has multiple cellular through hole, the surface of each through hole is coated with manganese dioxide particle.
Still as shown in Figure 2, control system provided by the invention comprises processor 21, display 22, alarm 23 and power supply 20 and wind pressure sensor assembly 16, wind pressure sensor 18, wind pressure sensor 17 and wind pressure sensor 18.Wherein, two sensors of wind pressure sensor assembly 16 be respectively arranged with primary filter 12 and two ends, for the difference of the blast of the blast and downstream that detect primary filter 10 upstream, leeway is converted to voltage u
1be input to processor 21; Two sensors of wind pressure sensor assembly 17 are separately positioned in negative pressure air channel and clean room, for the leeway of the blast and negative pressure air channel that detect clean room, leeway are converted to voltage u
2be input to processor 21; Leeway, for detecting the main blast of filter 13 upstream and the leeway in downstream, is converted to voltage u by air velocity transducer 18
3be input to processor 21.Processor is according to voltage u
1situation of change judge whether primary filter 12 lost efficacy, if lost efficacy, processor 21 can send a signal to alarm 23, and prompting user primary filter lost efficacy, and user changes primary filter in time.Processor is according to voltage u
3situation of change judge whether main filter lost efficacy, if lost efficacy, processor 21 can send a signal to alarm 23, and householder's filter failure is used in prompting, and user changes lower filter in time.Processor 21 is according to voltage u
3situation of change judge whether main filter lost efficacy, if lost efficacy, processor can send a signal to alarm, and householder's filter failure is used in prompting, user's more change owner filter in time.
Fig. 4 is the circuit diagram of the control system of Biohazard Safety Equipment provided by the invention.As shown in Figure 4, control system provided by the invention also comprises button AN1-AN6, upper limit Hall switch KH and lower limit Hall switch KL, and wherein button AN1-AN6 is arranged on the front shroud of housing.Upper limit Hall switch KH is arranged on the upper end of work, and lower limit Hall switch KL is arranged on the upper end of work.The lower end of glass retractable door is provided with magnet steel, and when door closes operating room, magnet steel is aimed at lower limit Hall switch KL, and KL1 closes.Processor 21 comprises controller, pressure reduction first threshold values comparator OP1, first photoelectrical coupler PE1, pressure reduction second threshold values comparator OP2, second photoelectrical coupler PE2, pressure reduction the 3rd threshold values comparator OP3, 3rd photoelectrical coupler PE3, pressure reduction the 4th threshold values comparator OP4, 4th photoelectric coupling PE4, for driving the first driver of the first relay J 1, for driving the second driver of the second relay J 2, for driving the 3rd driver of the 3rd relay J 3, for driving the 3rd driver of the 3rd relay J 3, for driving the four-wheel drive device of the 4th relay J 4, for driving the drive circuit of alarm and multiple relay.
Wherein, threshold values comparator OP1 to OP4 is operational amplifier.The in-phase end of the first threshold values comparator OP1 inputs the first threshold voltage, this voltage is obtained by power supply Ec dividing potential drop by RW1, the output of anti-phase termination first differential pressure pickup 16, the output of the first threshold values comparator OP1 through the first photoelectrical coupler PE1 in succession in controller.The end of oppisite phase of the second threshold values comparator OP2 inputs the second threshold voltage, this voltage is obtained by power supply Ec dividing potential drop by RW2, the output of homophase termination first differential pressure pickup 16, the output of the second threshold values comparator OP2 through the second photoelectrical coupler PE2 in succession in controller.In-phase end input the 3rd threshold voltage of the 3rd threshold values comparator OP3, this voltage is obtained by power supply Ec dividing potential drop by RW3, the output of anti-phase termination second differential pressure pickup 17, the output of the 3rd threshold values comparator OP1 through the 3rd photoelectrical coupler PE3 in succession in controller.End of oppisite phase input the 4th threshold voltage of the 4th threshold values comparator OP4, this voltage is obtained by power supply Ec dividing potential drop by RW4, the output of positive termination second differential pressure pickup 17, the output of the 4th threshold values comparator OP4 through the 4th photoelectrical coupler PE4 in succession in controller.
First driver comprises transistor TR1, resistance R1 and diode D1, and wherein the base stage TR1 of transistor is connected to controller through resistance R1, grounded emitter, and colelctor electrode connects the positive pole of diode D1.The negative pole of diode D1 connects power supply, and the two ends of diode D1 and the line bag of relay J 1 are in parallel.The first end of the power supply of one termination 220V of the normally opened contact of relay J 1, a terminal of another termination ultraviolet lamp 6, another terminal of ultraviolet lamp 6 connects the second end of the power supply of 220V.When user needs ultraviolet lamp 6 luminous, when pressing AN1, processor is checked through the signal pressing AN1, a high potential signal is provided to the base stage of transistor TR1, transistor turns, the line of the relay J 1 be connected with its colelctor electrode is surrounded by electric current to be passed through, and its normally opened contact closes, and ultraviolet lamp 6 connects 220V power supply and luminous; When user does not need ultraviolet lamp 6 luminous, when will press AN1 again, processor is checked through the signal pressing AN1, a low-potential signal is provided to the base stage of transistor TR1, transistor cutoff, the line bag of the relay J 1 be connected with its colelctor electrode does not have electric current to pass through, and its normally opened contact disconnects, and ultraviolet lamp 6 and 220V power supply disconnect.
Second driver comprises transistor TR2, resistance R2 and diode D2, and wherein the base stage TR2 of transistor is connected to controller through resistance R2, grounded emitter, and colelctor electrode connects the positive pole of diode D2.The negative pole of diode D2 connects power supply, and the two ends of diode D2 and the line bag of relay J 2 are in parallel.The first end of the power supply of one termination 220V of the normally opened contact of relay J 2, a terminal of another termination ultraviolet lamp 7, another terminal of ultraviolet lamp 7 connects the second end of the power supply of 220V.When user needs ultraviolet lamp 7 luminous, when pressing AN2, processor is checked through the signal pressing AN2, a high potential signal is provided to the base stage of transistor TR2, transistor turns, the line of the relay J 2 be connected with its colelctor electrode is surrounded by electric current to be passed through, and its normally opened contact closes, and ultraviolet lamp 7 connects 220V power supply and luminous; When user does not need ultraviolet lamp 7 luminous, when will press AN2 again, processor is checked through the signal pressing AN2, a low-potential signal is provided to the base stage of transistor TR2, transistor cutoff, the line bag of the relay J 2 be connected with its colelctor electrode does not have electric current to pass through, and its normally opened contact disconnects, and ultraviolet lamp 7 and 220V power supply disconnect.
3rd driver comprises transistor TR3, resistance R3 and diode D3, and wherein the base stage TR3 of transistor is connected to controller through resistance R3, grounded emitter, and colelctor electrode connects the positive pole of diode D3.The negative pole of diode D3 connects power supply, and the two ends of diode D3 and the line bag of relay J 3 are in parallel.The first end of the power supply of one termination 220V of the normally opened contact of relay J 3, a terminal of another termination illuminating lamp 28, another terminal of illuminating lamp 28 connects the second end of the power supply of 220V.When user needs illuminating lamp 28 luminous, when pressing AN3, processor is checked through the signal pressing AN3, a high potential signal is provided to the base stage of transistor TR3, transistor turns, the line of the relay J 3 be connected with its colelctor electrode is surrounded by electric current to be passed through, and its normally opened contact closes, and 220V power supply and luminous connected by illuminating lamp 28; When user does not need illuminating lamp 28 luminous, when will press AN3 again, processor is checked through the signal pressing AN3, a low-potential signal is provided to the base stage of transistor TR3, transistor cutoff, the line bag of the relay J 3 be connected with its colelctor electrode does not have electric current to pass through, and its normally opened contact disconnects, and illuminating lamp 28 and 220V power supply disconnect.
Four-wheel drive device comprises transistor TR4, resistance R4 and diode D4, and wherein the base stage TR4 of transistor is connected to controller through resistance R4, grounded emitter, and colelctor electrode connects the positive pole of diode D4.The negative pole of diode D4 connects power supply, and the two ends of diode D4 and the line bag of relay J 4 are in parallel.The first end of the power supply of one termination 220V of the normally opened contact of relay J 4, the other end connects a terminal of blower motor 4, and another terminal of blower motor 4 connects the second end of the power supply of 220V.When user needs blower motor 4 to work, when pressing AN4, processor is checked through the signal pressing AN4, a high potential signal is provided to the base stage of transistor TR4, transistor turns, the line of the relay J 4 be connected with its colelctor electrode is surrounded by electric current to be passed through, and its normally opened contact closes, and blower motor 4 is connected 220V power supply and works; When user does not need blower motor 4 to work, when will press AN4 again, processor is checked through the signal pressing AN4, a low-potential signal is provided to the base stage of transistor TR4, transistor cutoff, the line bag of the relay J 4 be connected with its colelctor electrode does not have electric current to pass through, and its normally opened contact disconnects, and blower motor 4 and 220V power supply disconnect.
For driving the drive circuit of alarm to comprise transistor TR5 and resistance R5, wherein the base stage TR5 of transistor is connected to controller through resistance R5, grounded emitter, and colelctor electrode connects one end of buzzer (alarm), another termination power of buzzer.The signal that first differential pressure pickup 16 inputs by pressure reduction first threshold values comparator OP1 and the first threshold values compare, when inputted signal is greater than or equal to the first threshold values, comparator OP1 exports high potential signal, this high potential provides a high potential signal through the first photoelectrical coupler to processor, signal is sent to alarm and display after this signal received by processor, make alarm equipment alarm, display is made to show the printed words of initial filtrator inefficacy, when inputted signal is less than the first threshold values, comparator OP1 exports low-potential signal; The signal that first differential pressure pickup inputs by pressure reduction second threshold values comparator OP2 and the second threshold values compare, when inputted signal is less than or equal to the second threshold values, comparator OP2 exports low-potential signal, this electronegative potential provides a low-potential signal through the second photoelectrical coupler to processor, signal is sent to alarm and display after processor receives this signal, make alarm equipment alarm, display is made to show the printed words of the first pressure reduction decomposer breakage, when inputted signal is greater than the second threshold values, comparator OP2 exports high potential signal.The signal that second differential pressure pickup inputs by pressure reduction the 3rd threshold values comparator OP3 and the 3rd threshold values compare, when inputted signal is greater than or equal to the 3rd threshold values, comparator OP3 exports high potential signal, this high potential provides a high potential signal through the 3rd photoelectrical coupler to processor, signal is sent to alarm and display after this signal received by processor, make alarm equipment alarm, display is made to show the printed words of main filter failure, when inputted signal is less than the 3rd threshold values, comparator OP3 exports low-potential signal; The signal that second ozone sensor inputs by ozone the 4th threshold values comparator OP4 and the 4th threshold values compare, when inputted signal is less than or equal to the 4th threshold values, comparator OP4 exports low-potential signal, this low-potential signal provides a low-potential signal through the first photoelectrical coupler to processor, signal is sent to alarm and display after processor receives this signal, make alarm equipment alarm, display is made to show the printed words of main filter breakage, when inputted signal is greater than the 4th threshold values, comparator OP4 exports high potential signal.
Control system provided by the invention also comprises the stepper motor driver for Driving Stepping Motor 24, and it is connected with controller by photoelectrical coupler.When user needs to open retractable door, user presses AN5, after processor receives the signal of AN5 connection, there is provided the pulse signal of rotating forward to stepper motor driver through photoelectrical coupler, motor rotates forward, and it drives retractable door to move up, at this moment Hall switch KH1 and KL1 all disconnects, at this moment continue to press AN5, motor continues to rotate forward, and retractable door continues to move up; When moving to topmost, the magnet steel in retractable door is aimed at Hall switch KH1, and KH1 connects, and processor does not provide signal through photoelectrical coupler to stepper motor driver after receiving this signal, and stepper motor is quit work.When user needs semi-closure retractable door, user presses AN6, after processor receives the signal of AN6 connection, there is provided the pulse signal of reversion to stepper motor driver through photoelectrical coupler, motor reversal, it drives retractable door to move down, at this moment Hall switch KH1 and KL1 all disconnects, at this moment continue to press AN6, motor continues reversion, and retractable door continues to move down; When moving to bottom, the magnet steel in retractable door is aimed at Hall switch KL1, and KL1 connects, and processor does not provide signal through photoelectrical coupler to stepper motor driver after receiving this signal, and stepper motor is quit work.Between voltage-stabilized power supply and 220V power supply, arrange K switch H2 and KL2, be to prevent, when control signal is inoperative, and positive closing power supply.
Below by reference to the accompanying drawings, operation principle of the present invention is described in detail.But those of ordinary skill in the art it should be understood that description is only for explaining claims.But protection scope of the present invention is not limited to description.Any those skilled in the art of being familiar with are in the technical scope that the present invention discloses, and the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (2)
1. a Control system of pollution-free biosafety cabinet, described safety cabinet comprises housing, operating room is provided with in housing, clean room and air circulation system, wherein clean room is arranged on operating room, air circulation system is used for circulating air between operating room and clean room, air circulation system comprises the blower fan being arranged on clean room's air inlet, it is characterized in that, described safety cabinet is disposed with primary filter between operating room and clean room, blower fan, first ultraviolet lamp, first photocatalyst layer, second ultraviolet lamp, second photocatalyst layer and main filter, described control system also comprises the first differential pressure pickup, first threshold values comparator and the second threshold values comparator, two detecting heads of this first differential pressure pickup are separately positioned on the two ends of primary filter, wherein, first threshold values comparator is used for the signal that exported by the first differential pressure pickup and the first threshold values compares, when inputted signal is greater than the first threshold values, processor sends signal to alarm and display, make alarm equipment alarm, display is made to show the printed words of primary filter inefficacy, second threshold values comparator is used for the signal that exported by the first differential pressure pickup and the second threshold values compares, when exported signal is less than the second threshold values, processor sends signal to alarm and display, makes alarm equipment alarm, makes display show the printed words of primary filter breakage, place corresponding with the air outlet of the second smooth contact layer on the left wall of clean room is provided with distinguished and admirable guide way, wherein, the in-phase end of the first threshold values comparator (OP1) inputs the first threshold voltage, this first threshold voltage is obtained by power supply (Ec) dividing potential drop by the first variable resistor (RW1), the output of anti-phase termination first differential pressure pickup (16), the output of the first threshold values comparator (OP1) through the first photoelectrical coupler (PE1) in succession in controller, the end of oppisite phase of the second threshold values comparator (OP2) inputs the second threshold voltage, this second threshold voltage is obtained by power supply (Ec) dividing potential drop by the second adjustable resistance (RW2), the output of homophase termination first differential pressure pickup (16), the output of the second threshold values comparator (OP2) through the second photoelectrical coupler (PE2) in succession in controller.
2. Control system of pollution-free biosafety cabinet according to claim 1, it is characterized in that, described control system also comprises the second differential pressure pickup, 3rd threshold values comparator and the 4th threshold values comparator, two detecting heads of the 3rd differential pressure pickup are separately positioned on the two ends of main filter, wherein, 3rd threshold values comparator is used for the signal that exported by the 3rd differential pressure pickup and the 3rd threshold values compares, when inputted signal is greater than the 3rd threshold values, processor sends signal to alarm and display, make alarm equipment alarm, display is made to show the printed words of main filter failure, 4th threshold values comparator is used for the signal that inputted by the second differential pressure pickup and the 4th threshold values compares, when inputted signal is less than the 4th threshold values, processor sends signal to alarm and display, make alarm equipment alarm, display is made to show the printed words of main filter breakage, wherein, in-phase end input the 3rd threshold voltage of the 3rd threshold values comparator (OP3), 3rd threshold voltage is obtained by power supply (Ec) dividing potential drop by the 3rd variable resistor (RW3), the output of anti-phase termination second differential pressure pickup (17), the output of the 3rd threshold values comparator (OP1) through the 3rd photoelectrical coupler (PE3) in succession in controller, end of oppisite phase input the 4th threshold voltage of the 4th threshold values comparator (OP4), 4th threshold voltage is obtained by power supply (Ec) dividing potential drop by the 4th variable resistor (RW4), the output of positive termination second differential pressure pickup (17), the output of the 4th threshold values comparator (OP4) through the 4th photoelectrical coupler (PE4) in succession in controller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310086479.0A CN103127965B (en) | 2013-03-19 | 2013-03-19 | Control system of pollution-free biosafety cabinet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310086479.0A CN103127965B (en) | 2013-03-19 | 2013-03-19 | Control system of pollution-free biosafety cabinet |
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| Publication Number | Publication Date |
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| CN103127965A CN103127965A (en) | 2013-06-05 |
| CN103127965B true CN103127965B (en) | 2014-12-31 |
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| CN201310086479.0A Active CN103127965B (en) | 2013-03-19 | 2013-03-19 | Control system of pollution-free biosafety cabinet |
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| JP3504671B2 (en) * | 1996-05-15 | 2004-03-08 | 松下電器産業株式会社 | Deodorizer / sterilizer with catalyst deterioration detection function and method for preventing excessive ozone release from deodorizer / sterilizer |
| CN1193281C (en) * | 1999-11-15 | 2005-03-16 | 西门子公司 | Automation equipment and update method |
| US7056476B2 (en) * | 2000-06-15 | 2006-06-06 | Kabushiki Kaisha Toshiba | Refrigerator and deodorizer producing ozone by high-voltage discharge |
| CN2730378Y (en) * | 2004-09-21 | 2005-10-05 | 傅朝春 | Photocatalyst deodorizing and sterilizing device, and deodorizing and sterilizing system |
| CN2829660Y (en) * | 2005-09-15 | 2006-10-25 | 周德君 | Dental silver amalgam mixer safety door |
| CN2843457Y (en) * | 2005-12-03 | 2006-12-06 | 海尔集团公司 | Biological safety cupboard |
| CN201023049Y (en) * | 2007-03-01 | 2008-02-20 | 李晨 | External rotor fan type biological safety cabinet |
| CN101551143B (en) * | 2008-04-02 | 2011-09-28 | 展晶科技(深圳)有限公司 | Air purifier |
| ES2574237T3 (en) * | 2009-03-12 | 2016-06-16 | Dow Global Technologies Llc | Sterilization and decontamination of a closed environment |
| CN201558343U (en) * | 2009-12-16 | 2010-08-25 | 山东新华医疗器械股份有限公司 | Disinfection type biological safety cabinet |
| CN201618177U (en) * | 2010-02-09 | 2010-11-03 | 上海理工大学 | Biosafety cabinet controller |
| CN201945290U (en) * | 2010-11-30 | 2011-08-24 | 上海力申科学仪器有限公司 | Detection structure for cabinet door switch of biological safety cabinet |
| CN102589055A (en) * | 2012-03-06 | 2012-07-18 | 江苏瑞丰科技实业有限公司 | PM2.5 (Phase Modulation) integral air purification treatment device |
| CN202497789U (en) * | 2012-03-06 | 2012-10-24 | 江苏瑞丰科技实业有限公司 | PM2.5 integrated air purifying treatment device |
| CN102872923A (en) * | 2012-10-16 | 2013-01-16 | 立德泰勀(上海)科学仪器有限公司 | Biosafety cabinet provided with easily-assembled and disassembled filters |
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Address after: 201607 Shanghai Songjiang District City Maogang town of strong Road No. 599 Patentee after: Shanghai Boxun Medical Biological Instrument Corp. Address before: 200071, room 9, 909 floor, Shen Shen building, No. 198, Shanghai, Zhongshan Road Patentee before: Shanghai Boxun Industry & Commerce Co., Ltd. |